.wrap { width: 100%;margin: 0px auto;}

/*导航*/
.header{width: 100%;max-width:640px;margin:0 auto;height:60px;background-color: #303641;position:relative;}
.header .logo{width:60px;height:60px;text-align: center;background: url(../images/logo.png) no-repeat center;}
.header span{color:#ECEFF1;font-size: 20px;line-height: 60px;}
.header .more{width:50px;height:68px;text-align: center;}
.header .more img{width:30px;height:25px;margin-top: 20px;}
.header .nav-item{width:100%;position:absolute;top:60px;background-color: #303641;color:#ECEFF1;display:none;border-top:1px solid #ECEFF1;z-index: 99999999;}
.header .nav-item a{display:inline-block;font-size: 16px;width: 24%;height: 32px;line-height: 32px;text-align: center;color: #ECEFF1;}